target maternity leggings

Anyone bought them? The 16.99 ones? I tried the xs and small ones on at the store and bought the small because they have more room ..... then I got home and realized they have too much room. And couldn't comfortably wear them out of the house. I'm currently 19 weeks pregnant. I know I will probably grow more but I'm worried they still would be too big. Has anyone bought them or have experience of if they shrink or not? Or should I take them back and exchange for xs?